









🖤 Smart, sleek, and secure—your ultimate A5 binder for next-level note mastery.
The Kokuyo Campus Smart Ring Binder is a Japanese-imported, ultra-thin A5 notebook binder featuring a 20-hole smart ring system that securely holds up to 25 refill sheets. Its frosted black polypropylene cover offers durability and style, while the 360° fold and 180° lay-flat design optimize writing comfort. Included are 10 premium Kokuyo Sarasara loose-leaf papers with archival-quality, pH-neutral 6mm dotted lines, making it ideal for professionals and students seeking a compact, refillable, and highly functional binder.


| Manufacturer | KOKUYO |
| Brand | KOKUYO |
| Model Number | ル-SP131D |
| Product Dimensions | 1.3 x 17.6 x 22.1 cm; 60 g |
| Colour | Black |
| Cover Material | R-PP |
| Material Type | Polypropylene |
| Size | A5 |
| Sheet Size | A5 |
| Number of Holes | 20 |
| Manufacturer Part Number | ル-SP131D |
| Item Weight | 60 g |
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